package www.reagnetbox.com.scan;


import java.io.UnsupportedEncodingException;
import java.util.Arrays;

public class CmdUtils {
	private static boolean littleEndian = true;
	private static int[] crc16tab = {
			0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
			0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
			0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
			0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
			0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
			0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
			0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
			0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
			0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
			0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
			0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
			0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
			0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
			0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
			0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
			0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
			0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
			0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
			0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
			0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
			0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
			0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
			0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
			0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
			0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
			0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
			0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
			0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
			0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
			0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
			0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
			0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
	};


	public static byte[] getCrc(byte[] datas) {
		if (datas == null) {
			return null;
		}

		LogComm.printf("getCrc src:" + CHexConver.byte2string(datas));
		int crc16 = 0;
		byte[] res = new byte[2];
		for (byte data : datas) {
			crc16 = (crc16 << 8) ^ crc16tab[((crc16 >> 8) ^ data) & 0xff];
		}
		if (!littleEndian) {
			res[0] = (byte) (crc16 & 0xFF);
			res[1] = (byte) ((crc16 >> 8) & 0xFF);
		} else {
			res[1] = (byte) (crc16 & 0xFF);
			res[0] = (byte) ((crc16 >> 8) & 0xFF);
		}
		return res;
	}

	public static byte[] getSetCmd(byte[] cmd) {
		if (cmd == null || cmd.length == 0) {
			return null;
		}
		byte[] res = new byte[cmd.length + 4 + 2];
		res[0] = 0x7E;
		res[1] = 0x55;
		res[2] = (byte) cmd.length;
		res[3] = 'S';
		System.arraycopy(cmd, 0, res, 4, cmd.length);

		byte[] crc = getCrc(Arrays.copyOfRange(cmd, 2, res.length));

		if (crc != null) {
			System.arraycopy(crc, 0, res, res.length - 2, 2);
		}

		return res;
	}


	public static byte[] getExecCmd(byte[] cmd, byte[] val) {
		if (cmd == null || cmd.length == 0) {
			return null;
		}
		int valLen = 0;
		if (val != null) {
			valLen = val.length;
		}
		byte[] res = new byte[cmd.length + 4 + 2 + valLen];
		res[0] = 0x7E;
		res[1] = 0x55;
		res[2] = (byte) (cmd.length + valLen);
		res[3] = 'E';
		System.arraycopy(cmd, 0, res, 4, cmd.length);
		if (val != null) {
			System.arraycopy(val, 0, res, 4 + cmd.length, val.length);
		}

		byte[] crc = getCrc(Arrays.copyOfRange(res, 2, res.length - 2));

		if (crc != null) {
			System.arraycopy(crc, 0, res, res.length - 2, 2);
		}

		return res;
	}

	public static byte[] getTtsCmd(String text) throws UnsupportedEncodingException {
		byte[] res = null;
		byte[] data = text.getBytes("unicode");
		byte[] cmd = new byte[]{0x35, 0x33, 0x30, 0x31, 0x30, 0x30, 0x31};
		if ((data[0] & 0xFF) == 0xFF && (data[1] & 0xFF) == 0xFE) {
			res = CmdUtils.getExecCmd(cmd, Arrays.copyOfRange(data, 2, data.length));
		} else {
			res = CmdUtils.getExecCmd(cmd, data);
		}
		return res;
	}

	public static byte[] getTtsClearCmd() {
		byte[] cmd = new byte[]{0x35, 0x33, 0x30, 0x31, 0x30, 0x30, 0x30};
		return CmdUtils.getExecCmd(cmd, null);
	}

	public static byte[] toHidPos(byte[] cmd) {
		if (cmd != null && cmd.length < 64) {
			byte[] res = new byte[64];
			Arrays.fill(res, (byte) 0);
			res[0] = (byte)0xFD;
			System.arraycopy(cmd, 0, res, 1, cmd.length);
			return res;
		}

		return null;

	}
}
